I was playing the DS version earlier today, at least the graphics are good (unlike so many other games where you can see the polygons making up the characters.)
Doesn't suck as much as Spore did (for DS, that is)
It's like a better version of the Assassins Creed for DS, just more fun for slashing up things.
Note: don't play with the Uber-cheats, it's already easy 'nuff.
Total playing time is under 4 hours, but there is actually a storyline.